If your Acura RSX cranks but won’t start, the engine is usually missing fuel pressure, spark, injector pulse, compression or immobilizer authorization. Here’s how to test the real cause before replacing perfectly good parts.
A warm Acura RSX should not remain at 1,500 or 2,000 RPM. Diagnose vacuum leaks, throttle operation, IACV control and PCM sensor data before adjusting anything.